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Fertilizer and soil conditioner value of broiler manure biochars

Biochar 2019年第3期1卷 259-270页

作者： Riikka Keskinen Jari Hyvaluoma lauri sohlo Hanna Help Kimmo Rasa Natural Resources Institute Finland(Luke) Tietotie 431600 JokioinenFinland Present Address:Hame University of Applied Sciences Mustialantie 10531310 MustialaFinland Present Address:Pellon Group Oy Yrittajantie 1062375 YliharmaFinland Department of Physics Faculty of ScienceUniversity of Helsinki00014 HelsinkiFinland

Pyrolysis is an option for enhancing the sustainable management of broiler manure surpluses by producing a concentrated,hygienic char product with a fertilizer and soil conditioner *** this study,the impacts of pyrolysis conducted at 350,400 and 450℃ on total nutrient and harmful element concentrations in biochars derived from peat-bedded broiler manure were *** was placed on the availability of phosphorus(P).In addition,the pore structures of these biochars were explored using X-ray microtomography and image *** pyrolysis,35-50%,40-55%and 35-45%of the original carbon,nitrogen and sulfur contents,respectively,of the feedstock biomass were lost as *** elements,including P,were concentrated in the *** water-extractable P was found to be converted to less labile forms due to charring,the concentration effect and notable increase in sodium bicarbonate-extractable P rendered broiler manure biochars richer in total labile P in comparison with feedstock manure(7.1,10.0,11.1 and 14.8 g labile P kg^(−1)in feedstock and biochars produced at 350,400 and 450℃,respectively).The pore volume of the micrometer-scale porosity of the broiler manure biochar was comparable to that found earlier in wood-based *** comparison with wood-based biochars,the pore structure of broiler manure biochars was more versatile,and the pore size distribution was ***,part of the porosity was too large to store plant-available water,which may reduce the potential of broiler manure biochars to improve soil water storage capacity.

关键词： Poultry manure Pyrolysis Soil amendment Pore structure Phosphorus availability

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